Process of preparing an acetylene preparation of manganese.



UNITED STATES PATENT OFFICE.

THOMAS MAOALPINE, OF OHISWIOK, ENGLAND, ASSIGNOR TO ALCOHOL SYNDICATE,LIMITED, OF LONDON, ENGLAND.

PROCESS OF PREPARING AN ACETYEENE PREPARATION OF MANGANESE.

SPECIFICATION forming part of Letters Patent No. 686,663, dated November12, 1901.

Original application filed May 25, 1899,- Serial No. 718,303- Dividedand this application filed October 12, 1899. Serial No. 733,434. (Nospecimens.)

To all whom it may concern.-

Be it knownthat I, THOMAS MAOALPINE, a

subject of the Queen of Great Britain, resid-.

ing at Ghiswick, in the county of Middlesex,

England, have invented certain new and useful Improvements in Processesof Preparing an Acetylene Preparation of Manganese; and I do herebydeclare the following to be a full, clear, and exact description of theinvention,

such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention consists in an improved process for preparing a specialmanganese compound which can be advantageously used in the purificationof mineral oils. This manganese compound is prepared in the followingmanner: To a solution or emulsion composed of water containing theoxids, hydrates,

or carbonates of calcium, barium, magnesium,

sodium, potassium, or ammonium is added a nearly-saturated solution ofthe permanganates or manganates of calcium, barium, magnesium, sodium,potassium, or ammo- 2 5 nium. This compound solution is then treatedwith acetylene gas, as hereinafter stated. In practice Ifind itconvenient to take a solution in water of carbonate of sodium orcarbonate of potash, or of a mixtureof the two, of a specific gravity ofabout 1.07, although it is to be understood that I do not restrictmyself to these substances, but may use any of the substances mentionedabove. To this solution I add a saturated or nearly-satu- 3 5 ratedsolution in water of permanganate of potash. The point at which theaddition of permanganate should be stopped can be determined byobserving the color of the solution or emulsion. If an excess ofpermanganate is used, the color will be purplish red.

Such excess is to be avoided. The addition of the permanganate shouldbestopped as soon as a faint reddish tinge appears in the solution oremulsion. It should be under- Vention.

The above processes are usually conducted at the ordinary temperatures;but to accelerate the process the temperatures of the solutions may beslightly raised, and'to increase the speed of absorption of theacetylene gas the latter may be introduced into the liquid mixture underpressure.

Having thus prepared my acetylene compound of manganese, Iuse it in thepurification of mineral oil as follows: I take crude mineral oil andtreat it with said manganese Having now described my invention, what Idesire to claim is- 1. The process of preparing a manganese compoundwhich consists in subjecting a solution or emulsion of compounds ofthealkalies or alkaline earths tothe action of acetylene gas and addingto the resulting product a solution containing manganese, substantiallyas described.

2; The process of preparing a manganese compound which consists insubjecting a solution or emulsion of compounds of the alkalies oralkaline earths to the action of acetylene gas and adding to theresulting product a solution containing manganese and then subjectingthe product to the further action of acetylene gas and separating outthe precipitated compound of acetylene and manganese, substantially asdescribed.

THOMAS MAOALPINE. 'Witnesses:

FREDERIC Pamon,

JOHN STOREY.

